Floating reamer and tap holder.



Patented Oct. 30, 1917.

GtbozuegJ l. E. SHEUMAN. FLOATING BEAMER AND TAP HOLDER.

' APPLICATION FILED NOV. I8. 1916.. y 1,244,648.

- UNITED `sTATEs PATENT oEEToE. i

JAMES E. SHEUMANF WYNESBORO,PENNSYLVANIA.

FLOATING BEAMER AND TAP HOLDER.

- Y Specioation of Letters Patent.

Patented ocaso, 1917i.

Application filed November 18, 1916. Serial 11o. 132,130.

I ToaZZ 'who'mz'tmay concern.: i

Be itknown that I, JAMES E. SHEUMAN,

a citizen 'of the United States, residing aty scribedand particularly set forth in the accompanying claims'.

The invention has for its purpose to provide a floating reamer and tap `holder that will automatically compensate or allow for l all deliciencies alineme-ntof the turret and spindle y'0f turretlatheszor automatic screw lmachines, and. without in .anyway interfer-A Iing with the manner 'ofworking oreciency jof such machines.

A further-,purpose of the invention is to providea tool holder of this character hav-..-

\ing a sensitive thrust bearingE ywhich will properly position 'the cutting tool when brought vinto contact vwith Athe work, therefby assuri'n that the piece will ybe reamed, or screwreaded, to thesizeofi the vtool y and with-uniformity throughoutav l The invention is lshown by way of illustration in the accompanying drawing, whereinf f v 4 1 is a side elevational view thereof, Fig. 2 a longitudinal section through the same Fig, 3 a front end elevation, and

Fig. 4 a longitudinal section of a modied,

form of tool carrying member.` Referring tothe'construction in further detail, and wherein like'reference charac.- iters designate corresponding vice consists of a bushing 5-hav1ng at one end a head 6 providing a recess 7 that is formed continuous with the bore 8 runnin the length of the bushing; and said bushing is adapted to be tted and secured to the turret of theslathe, or other machine, in any suitable manner. E@ A tool holder, comprising a shank 9 havfing a head 10, ts within the bore 8 of the bushing and is 0f slightly less diameter than said bore, whereby the shank may have limited play or movement f or centering the head 10 that carries the tool when' said tool parts, the deis brought into engagement with the work. The shank 9 is bored transversely adjacent itsrear end to receive thekey or pin 11 that is secured thereto by the screw 12, and the respective end portions of `said pin are littedy to have slight movement within Ithe -alined apertures 13 formed in the bushing 5,/as shown in Fig. 2.

The tool carrying member 4iscentrally -bored, as at 141:,-to receive the cutter holder orA tool 15, and a threaded openin 16 formed in the headlO for the usual ocking The head 10 is of slightly/ less diameterA v than the diameter of the recess 7 andts partly within said recess, as shown in Fig. I2;

and an appropriate ball thrust bearing such as the Bantam thrust ball-bearing shown is .located within said recess between the head A6 of the bushing and the head 1O1of the tool carrying member. f' i The balla thrust bearing has for its purpose to,-automatically position ythe cutting tool when brought into contact with the work andthereby assure that the piece will be reamedror screw-threaded-,lto the size of the. tool, 4and also to relieve theshank 9 from -1 such strains asv would :occur` where there is no relative movement-.between the shank o thefftool holder and the bushing. l 1

Said thrust bearing comprises a pair of .hardened steel washers 17 and 18, havin a plurality of anti-frictionba'lls 19 there e- '.'bushin'gt` Thewasher 18is of slightly less diameter than vthe washer 17. to allow 0f slight angular movement ofthe head and permit the rear end 20 of the shank to have limited freedom of movement within the bore 8 of the bushing 5.

The construction of tool carrying member shown in Fig. ll'is the same as that disclosed in Figs. 1 and 2, excepting that the bore 21 is formed as a tapering socket to receive the tool piece with a wedge action after the wellknown manner. a

It is obvious Ythat those. skilled in theart may vary thedetails of construction and arrangement of 'parts' without materially 'def arting from the spirit of my invention, and l therefore do not wish to be limited to suoli features except as may be required by the claims.

Having thus fully described my said invention, what I claim as new and desire to Vsecure by Letters Patent, is:

cessed head surrounding the outer end ofk said aperture, a tool carrying member mounted loosely within said vbushing. and connected to rotate therewith to have a limited independent movement,y said tool -carrying member bein formed with a head adapted to' fit withm the head of the bushing, and a ball thrust bearing interposed between the adjacent faces of the recess in the bushing and the head of the tool carrying member,'substantially as set forth.

2. A tool holder comprising a bushing having a recessed head, a tool carrying member having a shank loosely tting in said bushing and having a head fitting in the recess of the head thereof, a loose connection between the shank of the tool. holder and the bushing, 4and a sensitive thrust bearing interposed between saidheads providing a floating mount for the tool holder, substantially as set forth.

3. A tool holder comprising a bushing having a recessed head, a tool carrying member having a shank loosely fitting 1n said bushingand having a head fitting in the recess of the head'` thereof, and a sensitive thrust bearing comprising a pair of washers with balls interposed therebetween located between said heads and providing a floating mount for the tool holder, substantially as set forth. 4 n

4. A tool holder-comprising va bushing A having a recessed head, a tool carrying member having a. shank of less diameter than the bore ofthe bushing and ahead of less diameter than the recess in the head of the bushing and fitting loosely therein, a pin and a thrust bearin vsaid tool holder, substantially as set forth.

Y 5. A tool holder comprising a bushing h'aving a recessed head, a tool carrying member having a shank of less diameter than the bore of the bushin and loosely fitting therein, said tool hol er having a head tting loosely in the recess of the bushing head, a pin secured to said shank and having loose engagement with the bushing, comprisin a pair of washers with antiriction bal s therebetween located within the recess of the bushing head and providing a floating mount for with antifriction balls therebetween located in the recess of the bushing head, substantially as set forth.

In witness whereof, I have hereunto set 'my hand and seal at Waynesboro, Pennsyl- Vania, this 9th da of November, A. D. nineteen hundred an sixteen. y

JAL/[ES E. SI-IEUMAN. [L. s.] Witnesses:

H. MILTON BENEDIGT, CEAS. W. CREMER. 

